No one ever said that Jesus ever said anything against gays, because there's no proof that he said anything. Only second hand (or more) hearsay.
No you cannot support things such as Gay Marriage and Gays adopting children or abortion and still call yourself a Christian, its hypocrisy, some people either don't know the scriptures as well as they think they do or are just in denial. Now thats not to say all Gay rights are hated by Christians or that gays themselves are because i believe gays should get all the rights they deserve and that includes being Gay however men cannot have children by themselves neither can women, things like marriage and children are heterosexual in nature.
There is no such thing as gay rights, as homosexuals have the same rights as everyone else, including equal protection of the law, such as marriage. Consequently, a Christian can support equal treatment of homosexuals under the law, in accordance with the Constitution, while privately practicing the tenets of his faith concerning homosexuality. Incorrect as to marriage, as it is indeed a fundamental right. And although adoption is not a right, courts have held that laws denying a homosexual the opportunity to adopt a child manifests an equal protection violation. See, e.g., Florida Dept. of Children & Families v. Adoption of X.X.G (2010).
Supporting gay rights to me doesn't have anything to do with either being a Christian or not being a Christian. I think being queer is wrong and it pisses me off for gay rights to be shoved down my throat and accepted as if it is normal behavior.